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The attached patch implements the soundex difference function which

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compares two strings' soundex values for similarity, from Kris Jurka.
Also mark the text_soundex() function as STRICT, to avoid crashing
on NULL input.
This commit is contained in:
Neil Conway
2005-01-26 08:04:04 +00:00
parent fd5437c78b
commit 1ac9f0e9f7
5 changed files with 56 additions and 14 deletions
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26
contrib/fuzzystrmatch/fuzzystrmatch.sql.in
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@@ -1,28 +1,30 @@
-- Adjust this setting to control where the objects get created.
SET search_path = public;
CREATE FUNCTION levenshtein (text,text)
RETURNS int
CREATE FUNCTION levenshtein (text,text) RETURNS int
AS 'MODULE_PATHNAME','levenshtein'
LANGUAGE 'C' WITH (iscachable, isstrict);
LANGUAGE C IMMUTABLE STRICT;
CREATE FUNCTION metaphone (text,int)
RETURNS text
CREATE FUNCTION metaphone (text,int) RETURNS text
AS 'MODULE_PATHNAME','metaphone'
LANGUAGE 'C' WITH (iscachable, isstrict);
LANGUAGE C IMMUTABLE STRICT;
CREATE FUNCTION soundex(text) RETURNS text
AS 'MODULE_PATHNAME', 'soundex'
LANGUAGE 'C' WITH (iscachable, isstrict);
LANGUAGE C IMMUTABLE STRICT;
CREATE FUNCTION text_soundex(text) RETURNS text
AS 'MODULE_PATHNAME', 'soundex'
LANGUAGE 'C';
LANGUAGE C IMMUTABLE STRICT;
CREATE FUNCTION difference(text,text) RETURNS int
AS 'MODULE_PATHNAME', 'difference'
LANGUAGE C IMMUTABLE STRICT;
CREATE FUNCTION dmetaphone (text) RETURNS text
LANGUAGE C IMMUTABLE STRICT
AS 'MODULE_PATHNAME', 'dmetaphone';
AS 'MODULE_PATHNAME', 'dmetaphone'
LANGUAGE C IMMUTABLE STRICT;
CREATE FUNCTION dmetaphone_alt (text) RETURNS text
LANGUAGE C IMMUTABLE STRICT
AS 'MODULE_PATHNAME', 'dmetaphone_alt';
AS 'MODULE_PATHNAME', 'dmetaphone_alt'
LANGUAGE C IMMUTABLE STRICT;